Harrow



(No Model.) 2 Sheets-Sheet 1. A. B. FRIEDRICH.

HARROW.

No. 389,216. Patented Sept. 11, 1888.

(No Model.\

.2 Sheets-Sheet 2.

A. B. FRIEDRICH.

HARROW.

No. 889,216. Patented Sept. 11, 1888.

UNITED STATES ATENT OFFICE.

ALBERT B. FRIEDRICH, OF LIVINGSTON, WISCONSIN.

HARROW.

SPECIFICATION forming part of Letters Patent No. 389,216, datedSeptember 11, 1888.

Application filed January 3], 1888. Serial No. 262,537.

To all whom it may concern.-

Be it known that I, ALBERT B. FRLnDRioH, a citizen of the United States,residing at Livingston, in the county of Grant and State of Wisconsin,have invented certain new and useful Improvements in Harrows; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention has relation to harrows, particularly that class ofharrows in which the teeth are pivoted and reversible; and my saidinvention consists in a head for holding the reversible tooth, ofpeculiar novel construction, whereby the tooth is securely held inplace, a certain amount of play permitted thereto, and at the same timethe transverse bars composing the harrow are held in place, as will behereinafter more fully explained.

The object of this invention is to provide an effective yet simple andeconomical harrow; and to this end I proceed as follows, reference beingbad to the accompanying drawings, in whieh Figure 1 represents a plan ofa harrow constructed according to my invention, and Figs. 2, S, and 4are detail views of the head for holding the teeth and cross-bars of thebar row in place. Fig. 5 is a view of one of the diagonal bars. Fig. 6is a View in detail perspective of the several parts composing the toothholder or head, showing the said head, tooth, and bars of the harrow intheir respective positions with relation to each other and their mode ofattachment.

This harrow usually consists of two, three, or more sections, A B,which, as shown in Fig. l, are attached to an evener; but only onesection may be used, if desired, and each section is composed of a frontand back bar, a b, and a series of diagonal bars, a I), crossing eachother at oblique angles, at the intersections of which the teeth 0 aresecured in the head D D. Each of these teeth 0 is formed with an eye, a,by which they are secured to the head D, and this head is formed,preferably, of cast malleable iron in two sections, D and D, each ofwhich has a head, (I, to receive a bolt, E, by which the parts aresecured together. This bolt E also passes (No modeLl through thediagonal bars of the harrow, and thus secures these portions together aswell as the sections of the head. The top portion of the head is alsoformed, in addition to the head d, with lugs or cars d, between whichthe tooth is secured, as shown in Figs. 2 and 3, by a bolt, F, and atthe under side of said portion of the head is formed a seat or channel,(1 Figs. 4 and 6, to receive the top cross-bars of the harrow. Thebottom portion, D, of the head is also formed with a similar seat orchannel, 0, Figs. 4 and 6, to receive the lower diagonal bars, and witha slot, 6, within which the tooth plays, which play of the tooth islimited by the end 6 of said slot, as shown in Fig. 2.

The head for holding the tooth is, as before stated, preferably of castmetal and in two sections, as shown, and by reason thereof the teeth arepivotally held in place and have a limited movement and maybe reversedwhen desired. The cross-bars of the frame are also held together andfrom any lateral displace ment.

With reference to arranging the teeth in the frame so that they will notfollow one behind the other, the distance apart of said teeth is thesame in the front and back bars, a b, and also in the diagonal barsb-viz., about twelve and one-half incheswhile the spaces between theteeth of the top bars, a, is less thanin the bars b and a-viz., abouteleven and onefourth inches. Each tooth will therefore oc cupy its ownpath, as shown in dotted lines of Fig. 1.

The frame composing the harrow is so arranged that it will be the sameupon each side, where attachments, as at h, are provided for the evener,as shown in Fig. 1. The harrow may therefore be used either side first,and when it is drawn in the direction indicated by the arrow in Fig. 1the teeth will stand straight, while if drawn in an opposite directionthe teeth will be slanting, as shown in Fig. 2. From the links h on thebars a and b a rod, It, extends to and is secured at the first crotch ofthe diagonal bars a b, whereby the parts are strengthened and heldrigid.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is

In a harrow, the combination,with the tooth C, having the eye a, anddiagonal bars a, b, gular socket d? e, to receive and hold the cross- 10having holes at their crossing points, of the bars a and b,respectively, and bolts E and head for securing said tooth and bars ofthe F, all constructed and arranged as described, harrow together,composed of two sections, D for the purposes specified.

and D, the top section, D, being formed with ears d to receive thetooth, and the bottom FRIEDRICH section, D, a slot, 6, and stop 6", tolimit the play of said tooth, and each of said sections D and D formedwith a sockethead, d, and an- Witnesses:

W. M. COMSTOOK, GEO. FRIEDRICH.

